export default{
    namespaced:true,
    state:{
        cartData:[]
    },
    mutations:{
        SET_CART(state,payload){
            // state.cartData = payload

            let target = state.cartData.find(item => item.id === payload.id)
            if(!target){
                let obj = {
                    title:payload.title,
                    price:payload.price,
                    count:1,
                    id:payload.id,
                }
                state.cartData.push(obj) 
            }else{
                target.count++
            }

            


        }
    },
    actions:{
        ADD_CART(context,payload){
            // console.log('cart action---',payload)
            context.commit('SET_CART',payload)

            context.commit('product/DECREASE_INVENTORY',payload.id,{root:true})
        }
    },
    // 总价计算
    getters:{
        total(state){
            return (state.cartData.reduce((total,item)=>{
                return total+= item.price*item.count
            },0)).toFixed(2)
        }
    }
}